Implementation of an automated dnapl recovery system at a former MGP site

摘要

This paper presents the desing details ,oeprational history,and recovery results of an automated DNAPL recovery system implemented at a former MGP site that uses a belt recovery system.The belt recovery system is a low-cost,low maintenance method for the recovery of accumulate DNAPL in the subsurface.the system operates by circulating a flexible recovey belt inside a well.The belt is supported by a head pulley at hte top of hte well,and a stalinless steel rod and tail uplley hold the belt in alce at the bottom of the well.thje belt criculates down the wel and apsses through acceumulated coal-tar DNAPL at the bottom of the well,thereby coatin the belt with a thin layer of tar.As the belt returns to the top of the well,the DNAPL is scraped off of the belt via wiper blades.